/*
 * BOLLMASlipCandleStickChart.java
 * Android-Charts
 *
 * Created by limc on 2014.
 *
 * Copyright 2011 limc.cn All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package cn.limc.ohoscharts.view;


import cn.limc.ohoscharts.common.IFlexableGrid;
import cn.limc.ohoscharts.entity.DateValueEntity;
import cn.limc.ohoscharts.entity.LineEntity;
import ohos.agp.components.AttrSet;
import ohos.agp.components.Component;
import ohos.agp.render.Canvas;
import ohos.agp.render.Paint;
import ohos.agp.render.Path;
import ohos.agp.utils.Color;
import ohos.agp.utils.Point;
import ohos.app.Context;

import java.util.List;

/**
 * <p>
 * en
 * </p>
 * <p>
 * jp
 * </p>
 * <p>
 * cn
 * </p>
 *
 * @author limc
 * @version v1.0 2014/01/23 16:27:58
 */
public class BOLLMASlipCandleStickChart extends MASlipCandleStickChart {

  private List<LineEntity<DateValueEntity>> bandData;

  /**
   * <p>
   * Constructor of BOLLMASlipCandleStickChart
   * </p>
   * <p>
   * BOLLMASlipCandleStickChart类对象的构造函数
   * </p>
   * <p>
   * BOLLMASlipCandleStickChartのコンストラクター
   * </p>
   *
   * @param context
   * @param attrs
   * @param defStyle
   */
  public BOLLMASlipCandleStickChart(Context context, AttrSet attrs,
                                    int defStyle) {
    super(context, attrs, defStyle);
    // TODO Auto-generated constructor stub

  }

  /**
   * <p>
   * Constructor of BOLLMASlipCandleStickChart
   * </p>
   * <p>
   * BOLLMASlipCandleStickChart类对象的构造函数
   * </p>
   * <p>
   * BOLLMASlipCandleStickChartのコンストラクター
   * </p>
   *
   * @param context
   * @param attrs
   */
  public BOLLMASlipCandleStickChart(Context context, AttrSet attrs) {
    super(context, attrs);
    // TODO Auto-generated constructor stub

  }

  /**
   * <p>
   * Constructor of BOLLMASlipCandleStickChart
   * </p>
   * <p>
   * BOLLMASlipCandleStickChart类对象的构造函数
   * </p>
   * <p>
   * BOLLMASlipCandleStickChartのコンストラクター
   * </p>
   *
   * @param context
   */
  public BOLLMASlipCandleStickChart(Context context) {
    super(context);
    // TODO Auto-generated constructor stub

  }

  @Override
  protected void calcDataValueRange() {
    super.calcDataValueRange();

    double maxValue = this.maxValue;
    double minValue = this.minValue;
    // 逐条输出MA线
    for (int i = 0; i < this.bandData.size(); i++) {
      LineEntity<DateValueEntity> line = this.bandData.get(i);
      if (line != null && line.getLineData().size() > 0) {
        // 判断显示为方柱或显示为线条
        for (int j = displayFrom; j < displayFrom + displayNumber; j++) {
          DateValueEntity lineData = line.getLineData().get(j);
          if (lineData.getValue() < minValue) {
            minValue = lineData.getValue();
          }

          if (lineData.getValue() > maxValue) {
            maxValue = lineData.getValue();
          }

        }
      }
    }
    this.maxValue = maxValue;
    this.minValue = minValue;
  }

  /*
   * (non-Javadoc)
   *
   * <p>Called when is going to draw this chart<p> <p>チャートを書く前、メソッドを呼ぶ<p>
   * <p>绘制图表时调用<p>
   *
   * @param canvas
   *
   * @see ohos.view.View#onDraw(ohos.graphics.Canvas)
   */

  @Override
  public void onDraw(Component component, Canvas canvas) {
    super.onDraw(component, canvas);

    // draw lines
    if (null != bandData && bandData.size() >= 2) {
      drawAreas(canvas);
      drawBandBorder(canvas);
    }
  }


  /**
   * <p>
   * draw lines
   * </p>
   * <p>
   * ラインを書く
   * </p>
   * <p>
   * 绘制线条
   * </p>
   *
   * @param canvas
   */
  protected void drawAreas(Canvas canvas) {
    if (null == bandData) {
      return;
    }
    // distance between two points
    float lineLength;
    // start point‘s X
    float startX;
    float lastY = 0;
    float lastX = 0;

    LineEntity<DateValueEntity> line1 = (LineEntity<DateValueEntity>) bandData
            .get(0);
    LineEntity<DateValueEntity> line2 = (LineEntity<DateValueEntity>) bandData
            .get(1);
    List<DateValueEntity> line1Data = line1.getLineData();
    List<DateValueEntity> line2Data = line2.getLineData();

    if (line1.isDisplay() == false || line2.isDisplay() == false) {
      return;
    }
    if (line1Data == null || line2Data == null) {
      return;
    }

    Paint mPaint = new Paint();
    mPaint.setColor(new Color(line1.getLineColor()));
    mPaint.setAlpha(0.2f);
    mPaint.setAntiAlias(true);
    // set start point’s X
    if (gridAlignType == IFlexableGrid.ALIGN_TYPE_CENTER) {
      lineLength = (dataQuadrant.getPaddingWidth() / displayNumber) - stickSpacing;
      startX = dataQuadrant.getPaddingStartX() + lineLength / 2;
    } else {
      lineLength = (dataQuadrant.getPaddingWidth() / (displayNumber - 1)) - stickSpacing;
      startX = dataQuadrant.getPaddingStartX();
    }
    Path areaPath = new Path();
    for (int j = displayFrom; j < displayFrom + displayNumber; j++) {
      float value1 = line1Data.get(j).getValue();
      float value2 = line2Data.get(j).getValue();

      // calculate Y
      float valueY1 = (float) ((1f - (value1 - minValue)
              / (maxValue - minValue)) * dataQuadrant.getPaddingHeight())
              + dataQuadrant.getPaddingStartY();
      float valueY2 = (float) ((1f - (value2 - minValue)
              / (maxValue - minValue)) * dataQuadrant.getPaddingHeight())
              + dataQuadrant.getPaddingStartY();

      // 绘制线条路径
      if (j == displayFrom) {
        areaPath.moveTo(startX, valueY1);
        areaPath.lineTo(startX, valueY2);
        areaPath.moveTo(startX, valueY1);
      } else {
        areaPath.lineTo(startX, valueY1);
        areaPath.lineTo(startX, valueY2);
        areaPath.lineTo(lastX, lastY);

        areaPath.close();
        areaPath.moveTo(startX, valueY1);
      }

      lastX = startX;
      lastY = valueY2;
      startX = startX + stickSpacing + lineLength;
    }
    areaPath.close();
    canvas.drawPath(areaPath, mPaint);
  }

  /**
   * <p>
   * draw lines
   * </p>
   * <p>
   * ラインを書く
   * </p>
   * <p>
   * 绘制线条
   * </p>
   *
   * @param canvas
   */
  protected void drawBandBorder(Canvas canvas) {

    if (null == this.bandData) {
      return;
    }

    if (bandData.size() <= 0) {
      return;
    }
    // distance between two points
    float lineLength = dataQuadrant.getPaddingWidth() / displayNumber - stickSpacing;
    // start point‘s X
    float startX;
    // draw lines
    for (int i = 0; i < bandData.size(); i++) {
      LineEntity<DateValueEntity> line = (LineEntity<DateValueEntity>) bandData.get(i);
      if (line == null) {
        continue;
      }
      if (line.isDisplay() == false) {
        continue;
      }
      List<DateValueEntity> lineData = line.getLineData();
      if (lineData == null) {
        continue;
      }
      Paint mPaint = new Paint();
      mPaint.setColor(new Color(line.getLineColor()));
      mPaint.setAntiAlias(true);
      // set start point’s X
      startX = dataQuadrant.getPaddingStartX() + lineLength / 2;
      // start point
      Point ptFirst = null;
      for (int j = displayFrom; j < displayFrom + displayNumber; j++) {
        float value = lineData.get(j).getValue();
        // calculate Y
        float valueY = (float) ((1f - (value - minValue)
                / (maxValue - minValue)) * dataQuadrant.getPaddingHeight())
                + dataQuadrant.getPaddingStartY();

        // if is not last point connect to previous point
        if (j > displayFrom) {
          canvas.drawLine(ptFirst.getPointX(), ptFirst.getPointY(), startX, valueY,
                  mPaint);
        }
        // reset
        ptFirst = new Point(startX, valueY);
        startX = startX + stickSpacing + lineLength;
      }
    }
  }

  /**
   * @return the bandData
   */
  public List<LineEntity<DateValueEntity>> getBandData() {
    return bandData;
  }

  /**
   * @param bandData the bandData to set
   */
  public void setBandData(List<LineEntity<DateValueEntity>> bandData) {
    this.bandData = bandData;
  }

}
